US 11,841,607 B2
Accessory device capable of being attached to or detached from electronic apparatus
Keiichiro Saito, Tokyo (JP); Yoshinobu Okano, Saitama (JP); and Takayuki Shu, Kanagawa (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Nov. 19, 2021, as Appl. No. 17/530,819.
Claims priority of application No. 2020-195525 (JP), filed on Nov. 25, 2020.
Prior Publication US 2022/0163875 A1, May 26, 2022
Int. Cl. G03B 17/56 (2021.01)
CPC G03B 17/566 (2013.01) 12 Claims
OG exemplary drawing
 
1. An accessory device capable of being attached to or detached from an electronic apparatus, comprising:
an operation member;
a lock mechanism configured to perform a locking operation to lock the accessory device and the electronic apparatus in response to an operation of the operation member;
a movement restriction release mechanism configured to release a restriction on a movement of the operation member; and
an operation restricting member configured to restrict an operation of the movement restriction release mechanism, and
wherein the operation restricting member makes it more difficult to perform the operation of the movement restriction release mechanism when a power of the accessory device is in an on state than when the power of the accessory device is in an off state.